Q.
Chlorine is liberated when we heat
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a
KMnO4+NaCl
b
K2Cr2O7+MnO2
c
Pb(NO3)2+MnO2
d
K2Cr2O7+ HCl
answer is D.
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Detailed Solution
K2Cr2O7+Conc HCl→Cl2
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